Product Review

This gigabit PoE splitter is used to supply power and transfer data to micro USB devices like RPi 3B+ via a single Ethernet cable with the help of an IEEE 802.3af compliant switch or injector. You don't need a separate power supply anymore. It uses no GPIO pins and is thus compatible with any 3b+ case with a fan or add-on 3b+ screen. It has plug-and-play compatibility with 3B+ and makes it easier for deployment, operation and maintenance in embedded and IoT projects.
uctronics poe splitter u515902
Specifications:

Compliant with IEEE 802.3af
Isolation: 2.5kV
Input: 802.3af 44-56V Mode A&B 300mA
Power Output: DC 5V/2A(up to 2.5A) 10W
Data Transfer rate: 10/100/1000 Mbps
Devices will be detected before poe input
Power Pin: support both 1/2(+/-),3/6(-/+) or 4/5(+),7/8(-)

Package including:

1pcs 48V to 5V Active PoE Splitters Micro USB Power Plug

The gigabit version update of UCTRONICS U5159 PoE splitter- uctronics ieee 802.3af micro usb active poe splitter (ASIN:B01MDLUSE7)